EP3278972B1 - Behälter zur aufbewahrung von lebensmitteln - Google Patents

Behälter zur aufbewahrung von lebensmitteln Download PDF

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Publication number
EP3278972B1
EP3278972B1 EP17185153.8A EP17185153A EP3278972B1 EP 3278972 B1 EP3278972 B1 EP 3278972B1 EP 17185153 A EP17185153 A EP 17185153A EP 3278972 B1 EP3278972 B1 EP 3278972B1
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EP
European Patent Office
Prior art keywords
container
laminate
edge
adhesive
barrier layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17185153.8A
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German (de)
English (en)
French (fr)
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EP3278972A1 (de
Inventor
Michelangelo Anderlini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfabio Srl
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Alfabio Srl
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Publication date
Application filed by Alfabio Srl filed Critical Alfabio Srl
Priority to PL17185153T priority Critical patent/PL3278972T3/pl
Publication of EP3278972A1 publication Critical patent/EP3278972A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B23/06—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/12—Deep-drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/04—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a layer being specifically extensible by reason of its structure or arrangement, e.g. by reason of the chemical nature of the fibres or filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00—Closures with filling and discharging, or with discharging, devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/42—Applications of coated or impregnated materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • B65D65/466—Bio- or photodegradable packaging materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/12—Coating on the layer surface on paper layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2272/00—Resin or rubber layer comprising scrap, waste or recycling material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4023—Coloured on the layer surface, e.g. ink
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
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    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Definitions

  • the invention relates to a container for storing food according to the preamble of claim 1 and a method for producing an inherently stable container according to claim 15.
  • MAP packages are typically made from multilayer thermoformable polymers or injection molded polymers or aluminum.
  • the oxygen barrier is achieved through the material properties and the faultless sealing with the sealing film.
  • the sealing is gas-tight and is achieved through the material properties of the surfaces to be sealed.
  • Multi-layer thermoformed polymer packaging is only slightly mechanically stable and has little heat resistance.
  • Packaged food can only be heated to a limited extent in thermoformed packaging.
  • Injection-molded polymers can be made thicker to make them more stable. However, this results in a higher price.
  • Smooth aluminum containers are widely used. These can be heated to high temperatures and can be sealed well to obtain MAP packaging. From the point of view of environmental protection and sustainability, the materials used are questionable, as they are neither biodegradable nor renewable materials.
  • Thermally formed shells such as in the EP 2014 0177 956 disclosed, meet properties such as heatability, biodegradability and good mechanical stiffness, but cannot be closed in a modified atmosphere. This is because creases inevitably form at the corners and edges of the container, since excess material is compressed at these points during deep drawing.
  • the sealing edge to which a lid can be attached to close the bowl, therefore also has such folds. Despite the folds on the sealing edge, the bowl with the lid can be sealed watertight. A gas-tight seal is not possible due to the presence of folds on the sealing edge.
  • existing folds weaken the structure of the material, which means that the material weight has to be increased in order to obtain the necessary rigidity.
  • a trough-shaped packaging container with a bottom and an adjoining peripheral edge.
  • the packaging container comprises at least two paper layers between which an adhesive or a plastic is provided. At the upper end of the edge there is a sealing edge on which a lid can be sealed.
  • the deep-drawability of the layers is improved in that at least one paper layer is enclosed by two plastic layers and the fiber-containing layers have increased moisture and are held loosely during molding. This enables slippage during forming.
  • these precautions for improved formability are expensive.
  • the layers must be moistened in a defined manner before forming. The layers can also slip unintentionally relative to one another before the deformation.
  • a deep-drawable packaging material which comprises a layer composite with two cardboard layers and an intermediate layer made of plastic, in particular polyethylene or polypropylene.
  • the packaging material comprises a barrier layer, which can be ethylene-vinyl alcohol copolymer, a ceramic coating or a metal foil.
  • a barrier layer which can be ethylene-vinyl alcohol copolymer, a ceramic coating or a metal foil.
  • the plastic layer nor the barrier layer are biodegradable.
  • neither polyethylene nor polypropylene are suitable for enduring temperatures which can be as low as -40 ° C when freezing packaged foods and up to 185 ° C when heating or warming packaged foods.
  • the cardboard layers have a high elasticity. As a result, the laminate can be prevented from tearing during deep-drawing. After deep-drawing, however, the cardboard layers have a restoring force which can be disadvantageous for the dimensional stability of the packaging material. This must be counteracted by the special selection of a thermoplastic plastic layer, which melts during deep drawing and then solidifies again after deep drawing.
  • the object of the invention is therefore to propose an inherently stable container for packaging foodstuffs which is biodegradable, compostable and heatable. At the same time, the container should be suitable for packaging food with a modified atmosphere.
  • the invention relates to a container as defined in claim 1 and a method of manufacturing the same as defined in claim 13. Preferred embodiments are defined in the dependent claims.
  • the invention relates to a container for storing food with a sealing edge having a sealing surface.
  • the container is free of additional outer packaging for stabilization. It is therefore not a layer of a container, for example a laminate that can be inserted into an outer packaging, which is not sufficiently stable and is therefore mechanically deformed by the weight of the intended contents to be filled, but an inherently stable container.
  • the container can be sealed with a lid or a film by the Lid or film is sealed with the sealing surface.
  • the container is formed from a laminate which comprises a first carrier layer and a barrier layer. The two layers are bonded to one another with an adhesive.
  • the laminate further comprises a second carrier layer made of cardboard or paper, produced from mechanically comminuted pulp, a single or multi-layer paper or cellulose and a second adhesive for connecting the first and the second carrier layer.
  • a second carrier layer made of cardboard or paper, produced from mechanically comminuted pulp, a single or multi-layer paper or cellulose and a second adhesive for connecting the first and the second carrier layer.
  • the object is achieved in an inherently stable container in that at least the sealing edge of the container or the sealing surface of the sealing edge is free of wrinkles and that the container is compostable or biodegradable according to the European standard EN 13432.
  • the second carrier layer and the second adhesive create a stretchable laminate, the stretchability of which increases during thermoforming. Corners and edges of a shape are therefore not formed on the laminate as in the prior art by the fact that excess laminate is creased. Rather, the material of the laminate can be stretched or overstretched, as a result of which the sealing edge in particular is free of folds, elevations and depressions and is therefore consistently smooth and flat over the entire sealing surface.
  • the sealing edge of the container according to the invention can be sealed in a gas-tight manner with a closure cover.
  • the cardboard layers no longer have any restoring force and remain dimensionally stable.
  • the laminate can be shaped in the deep-drawing process without creases. Since the carrier layers have no restoring force after deformation, deformation of the deep-drawn container after it has been deep-drawn is reliably avoided.
  • the person skilled in the art would not consider overstretching the cardboard layers beyond the elastic limit, since laminates according to the prior art have a lower elongation at break than the laminate according to the invention and would break or tear before the laminate can be formed into a wrinkle-free state.
  • the wrinkle-free deep-drawing by thermoforming is made even easier by the fact that the individual layers of the laminate can easily be moved against one another when heated.
  • the container according to the invention is therefore suitable that food can be packaged under a modified atmosphere.
  • the first and / or the second carrier layer are made of a paper which has a basis weight of at least 90 g / m 2 and an elongation at break of at least 7.5% in the longitudinal direction and at least 6.5% in the transverse direction . Due to the improved elongation at break of the papers in both dimensions or directions, they contribute to an improved elongation at break or extensibility of the laminate of at least 14.5% in the longitudinal direction and at least 12.5% in the transverse direction. So that the first and second cardboard backing layers can be stretched in the deep-drawing process, i.e. stretched beyond their elastic limit, the elongation at break of the selected paper must correspond to the claimed values.
  • the first and / or the second adhesive are expediently vinyl-copolymer-based.
  • Adhesives preferably have a dry weight of at least 3 g / m 2 .
  • the two adhesives can improve the overall elasticity of the laminate.
  • the first adhesive is an extrusion film made of compostable biopolymer with a weight per unit area of at least 12 g / m 2 and the second adhesive is an extrusion film made of compostable biopolymer with a basis weight of at least 10 g / m 2 .
  • the laminate therefore consists of two layers of paper, whereby the extrusion films can act as an adhesive and as a barrier layer.
  • the first extrusion film can also act as a barrier layer. However, it has a lower heat resistance and a lower moisture and oxygen barrier. For applications in which these properties meet market requirements, a further barrier layer can be dispensed with.
  • the first and second adhesive are only there to connect the first and second cardboard carrier layers to one another and the first carrier layer to connect to the barrier layer. Since the adhesives only need to have adhesive properties, they can be selected from the field of biodegradable and compostable adhesives.
  • the barrier layer is expediently a cellulose hydrate film, which is provided with a first vapor barrier coating at least on the side facing or facing away from the food to be stored.
  • the barrier layer is an extruded or laminated compostable biopolymer which acts as a first adhesive. This can reduce the costs of the barrier layer.
  • the water vapor permeability of the barrier layer at 38 ° C. and 90% humidity over 24 hours is less than 40 g / m 2 , preferably less than 30 g / m 2 and very particularly preferably less than 15 g / m 2 .
  • the container is therefore moisture and water resistant on the side that faces the food to be packaged.
  • the oxygen permeability of the barrier layer at 23 ° C and 50% humidity over 24 hours is less than 30 cm3 / m2.24 hbar, preferably less than 15 cm3 / m2.24 hbar and very particularly preferably less than 5 cm3 / m2.24h.bar.
  • the invention is preferably characterized in that the barrier layer is an extrusion film made of compostable biopolymer, the extrusion film having a weight per unit area of at least 12 g / m 2 .
  • the barrier layer is an extrusion film made of compostable biopolymer, the extrusion film having a weight per unit area of at least 12 g / m 2 .
  • the barrier layer is a water-based coating color, the coating color having a coating weight of at least 12 g / m 2 .
  • This embodiment is particularly readily biodegradable.
  • Acrylic polymers, acrylic copolymers, styrene copolymers and ethylene vinyl acetate copolymers are conceivable as materials.
  • the barrier layer is heat-sealable or cold-sealable.
  • the container can be sealed particularly easily with a lid or a film on the sealing edge.
  • the open edge of the sealing edge is expediently a beaded edge running all around. Such an edge is bent or rolled over, whereby a stiffening of the edge or the edge is achieved.
  • the beaded edge can therefore also be referred to as a rolled edge. This makes the container more stable and its wall thickness can be reduced.
  • the open edge of the sealing edge is rolled up in such a way that the open edge is located within the flanged edge and a further sealing surface is formed on the flanged edge.
  • This embodiment has the advantage that the open edge of the laminate is completely protected from the external environment, in particular from moisture and steam, as soon as the lid is sealed onto the sealing edge.
  • the open edge is rolled up in such a way that it is arranged between the sealing edge and the flanged edge. If the lid with the sealing surface of the sealing edge and another sealing surface on the The beaded edge is sealed, so the open edge is hermetically protected from the environment. As long as the seal is tight, no moisture or steam can penetrate the open edge and damage it.
  • the invention is characterized in that the laminate has an elongation at break of at least 12% both in the machining direction and in the transverse direction.
  • the laminate has at least 50% higher elongation at break than the strongest layer of the laminate.
  • the laminate is particularly well suited to being stretched during thermoforming or to being stretched into the plastic area. The laminate can therefore be stretched into the corners and edges of a deep-drawing mold and is not creased at these points.
  • the laminate is expediently deep-drawable and thermoformable in order to be able to produce inherently stable food containers from it.
  • a multi-layer paper as the laminate, no creases or creases occur on the sealing edge of the container produced during thermoforming.
  • the barrier parameters of the laminate for water vapor permeability at 23 ° C and 85% humidity over 24 hours are less than 220 g / m 2 , preferably less than 100 g / m 2 and very particularly preferably less than 15 g / m 2
  • the oxygen permeability of the laminate at 23 ° C. and 0% humidity over 24 hours is less than 1500 cm 3 / m 2 .24 h. bar, preferably less than 15 cm 3 / m 2. 24 h. bar and very particularly preferably less than 3 cm 3 / m 2 .24h.bar. This means that the packaged food is adequately protected from atmospheric oxygen.
  • the laminate cannot be softened by water vapor from the inside and the food cannot dry out.
  • the container has a base on which the laminate is deformed in such a way that at least one reinforcing rib is formed on the base and / or the laminate is deformed such that the container has a plurality of troughs for receiving food .
  • the possibility of deforming the laminate beyond its elastic limit not only has the advantage that the sealing edge and also other corners and edges of the container are free of folds. It can also be deep-drawn additional shapes on the container, which in the desired shape by overstretching in the area over the Elastic limit remain.
  • the molding of reinforcing ribs has the advantage that the floor has sufficient stability when the laminate thickness is reduced. This saves material costs.
  • the depth of the reinforcement ribs is preferably greater than or equal to 2 mm.
  • the laminate can be obtained by tandem extrusion lamination. This means that it can be produced particularly quickly in a single process. This feature results in a cheap and competitive laminate.
  • a further aspect of the invention relates to a method for producing the inherently stable container according to the invention from the laminate described above, characterized in that the laminate is formed into the container in a deep-drawing process and a first and / or second carrier layer made of cardboard or paper is deformed beyond its elastic limit and are thereby stretched to the container without wrinkles.
  • This allows wrinkle-free deep-drawn trays and in particular containers with a wrinkle-free sealing edge to be produced.
  • the carrier layers made of cardboard or paper are stretched beyond their elastic limit, they do not return to their original shape.
  • the carrier layers must have a certain elastic limit and elongation at break so that they can be converted into the plastic range by deep-drawing.
  • the plastic range lies between the elastic limit and the elongation at break.
  • the laminate is thermoformed into the container and stretched without creases during thermoforming, the individual laminate layers sliding against one another slightly during thermoforming.
  • the characteristics of the laminate mean that it can be stretched into a thermoforming shape and that there is no excess laminate that has to be creased to achieve the container shape.
  • the laminate can be printed on the outside and on the second carrier layer.
  • the inside and the outside of the container can be made more visually appealing.
  • the print can be seen on the inside as the extrusion, adhesive and barrier layer are transparent.
  • the container can be exposed to moisture on the outside, since condensation can form on the outside when the packaged food is thawed or reheated.
  • a water-repellent layer In order to prevent condensation from penetrating the laminate from outside, it is conceivable to paint the outside with a water-repellent layer.
  • the lacquer used can be a dispersion of an acrylic copolymer or other water-repellent polymers such as polyacrylic copolymers, styrene copolymers or acrylic acid copolymers. A combination of the polymers listed is also conceivable.
  • the container 23 according to the invention for packaging food is made from a laminate.
  • the laminate in particular the packaging laminate, which is designated as a whole by the reference numeral 11, is shown.
  • the basis of the laminate is formed by a first and a second carrier layer 13, 15, which give the laminate stability.
  • the carrier layers 13, 15 can be cardboard, a stiff single or multi-ply paper or made from cellulose fibers.
  • the carrier layers 13, 15 can be made from pure, mechanically comminuted and bleached pulp. So that the carrier layers 13, 15 can be deep-drawn for the production of vessels, they have a corresponding tensile strength. The production scrap can thereby be reduced and the production speed increased.
  • the first and second carrier layers 13, 15 are preferably a paper with a basis weight of at least 90 g / m 2 .
  • the extensibility is at least 7.5% in the longitudinal direction and at least 6.5% in the transverse direction.
  • the first carrier layer 15 has a first surface which faces the food to be packaged, and a second surface which faces the second carrier layer 13.
  • a barrier layer 17 which reduces the oxygen and water vapor permeability of the laminate 11 is provided on the first surface.
  • the barrier layer 17 has a water vapor permeability of at most 15 g / m 2 24h bar.
  • the oxygen permeability is preferably 3 cm 3 / m 2 ⁇ 24h ⁇ bar.
  • the thickness of the barrier layer 17 is preferably at least 10 ⁇ m.
  • the first and second paper 13, 15 or the first paper 15 and the barrier layer 17 are glued to one another by a first and a second adhesive 19, 21.
  • the first and second adhesives 19, 21 can be vinyl copolymer-based.
  • the first and second adhesives 19, 21 are preferably extrusion films.
  • the laminate 11 consists of two papers which are glued together by the first extrusion film.
  • the first and second extrusion films 19, 21 are preferably compostable biopolymers with a weight per unit area of at least 10 g / m 2 .
  • the second extrusion film can also have the required barrier properties, as a result of which an additional barrier layer 17 can be dispensed with. In this case, the second extrusion film 21 has a weight per unit area of at least 12 g / m 2 .
  • the laminate 11 has an elongation at break of at least 12% in the machine direction and in the transverse direction. Since the laminate 11 has a thickness of at least 250 ⁇ m, a container made from it is inherently stable and sufficiently rigid. The temperature resistance is between -40 ° C and at least 110 ° C and preferably at least 185 ° C. Food can therefore be frozen and heated in a container made from the laminate 11.
  • the laminate and the container are biodegradable and compostable in accordance with Euronorm 13432: 2002.
  • the laminate has one Share of renewable raw materials of 95% and preferably 98%.
  • the barrier properties of the laminate can be specified as follows: The water vapor permeability is preferably less than 15 g / m 2 over 24 hours at 23 ° C. and 85% humidity. The oxygen permeability of the laminate 11 is preferably less than 3 cm3 / m2.24 h bar at 23 ° C. and 0% humidity over 24 hours.
  • the laminate 11 can be thermoformed in that it is deep-drawn in a mold while it is heated. According to this method, a food container 23 with a protruding sealing edge 25 having a sealing surface 27 can be produced.
  • the sealing edge can be closed by a flanged or rolled edge 29. The rolled edge gives the container 23 additional stability, whereby the wall thickness of the container 23 can be reduced.
  • the open end 31 of the sealing edge 25 is rolled up.
  • the beaded or rolled edge 29 is offset downward in the direction of the base 32 in such a way that a further sealing surface 33 is formed on its upper side.
  • a lid 35 can now be connected to the container 23 in a gas-tight manner on the sealing surface 27 and the further sealing surface 33. Since the open end 31 of the sealing edge is arranged between the sealing surface 27 and the further sealing surface 33, it is hermetically sealed from the environment when the cover 35 is sealed onto the sealing surface 27 and the further sealing surface 33.
  • the open sealing edge 31 is therefore reliably protected from moisture and steam.
  • the individual layers of the laminate 11 can therefore not separate from one another at the open end 31 due to steam or moisture.
  • the laminate 11 becomes elastic in such a way that the sealing edge can be shaped without creases or grooves being formed.
  • the sealing edge is therefore smooth and even.
  • the absence of creases at least in the sealing edge 25 is achieved in that the laminate 11 has a higher elongation at break than laminates of the prior art.
  • the laminate 11 can be stretched beyond its elastic limit into the plastic range during deep-drawing, in order to achieve the desired shape and not tear. Because the elastic limit of the laminate 11 is deliberately exceeded without reaching the elongation at break, the laminate no longer has any restoring force in the overstretched areas.
  • the container 23 therefore remains in the The shape given by the deep-drawing process without it being changed after the shaping.
  • the elasticity is improved even further during thermoforming, as the individual layers can slide against each other due to the heating and can be moved towards each other.
  • the sealing edge 25 can therefore be sealed gas-tight with a cover 35.
  • the container 23 according to the invention can therefore be gas-protected or is suitable for packaging under a modified atmosphere.
  • the container allows packaging with a modified atmosphere, it has a low water vapor and oxygen permeability and is fat-resistant. It is biodegradable and compostable and is sufficiently temperature resistant to freeze and heat food in it.
  • the stability of the container 23 is further improved by the sealing edge 25 and the flanged edge 29.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
EP17185153.8A 2016-08-05 2017-08-07 Behälter zur aufbewahrung von lebensmitteln Active EP3278972B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17185153T PL3278972T3 (pl) 2016-08-05 2017-08-07 Pojemnik do przechowywania żywności

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01013/16A CH712789A1 (de) 2016-08-05 2016-08-05 Behälter zur Aufbewahrung von Lebensmitteln.

Publications (2)

Publication Number Publication Date
EP3278972A1 EP3278972A1 (de) 2018-02-07
EP3278972B1 true EP3278972B1 (de) 2020-10-07

Family

ID=57994991

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17185153.8A Active EP3278972B1 (de) 2016-08-05 2017-08-07 Behälter zur aufbewahrung von lebensmitteln

Country Status (5)

Country Link
EP (1) EP3278972B1 (da)
CH (1) CH712789A1 (da)
DK (1) DK3278972T3 (da)
ES (1) ES2839507T3 (da)
PL (1) PL3278972T3 (da)

Cited By (5)

* Cited by examiner, † Cited by third party
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US20200399011A1 (en) * 2014-11-17 2020-12-24 Gpcp Ip Holdings Llc Press-Formed Disposable Container Made from a Laminated Paperboard Structure
WO2022171572A1 (de) * 2021-02-12 2022-08-18 M+C Schiffer Gmbh Verfahren zur herstellung eines behälters aus fasermaterial und behälter aus fasermaterial
WO2022197903A1 (en) * 2021-03-19 2022-09-22 Selig Sealing Products, Inc. Compostable sealing member
US11708198B2 (en) 2018-07-09 2023-07-25 Selig Sealing Products, Inc. Grip enhancements for tabbed seal
US11866242B2 (en) 2016-10-31 2024-01-09 Selig Sealing Products, Inc. Tabbed inner seal

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DE102019200385B4 (de) * 2018-12-14 2021-01-14 Lambert Dustin Dinzinger Becher aus cellulosehydrat und/ oder pappe/ zellstoff-stärke-mix mit cellulosehydrat-beschichtung und verfahren zur produktion derselben
AT523647B1 (de) * 2020-07-06 2021-10-15 Gottfried Maier Lebensmittelverpackung aus einem tiefgezogenen, gasdicht versiegelten Behälter aus Karton
DE102020123123A1 (de) * 2020-09-04 2022-03-10 Koehler Innovation & Technology Gmbh Verpackung mit Papiermaterial
EP4176724A1 (en) 2021-11-09 2023-05-10 Universität Hohenheim Use of an oleogel as a layer or coating

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DE102008014758A1 (de) * 2008-03-18 2009-10-08 Inde Plastik Betriebsgesellschaft Mbh Geschlossene Portionspackung mit Dichtung
CH700284A2 (de) * 2009-01-28 2010-07-30 Alcan Tech & Man Ltd Laminat und durch Tiefziehen aus dem Laminat hergestellter Behälter.
US8741443B2 (en) * 2011-05-18 2014-06-03 Powertray, LLC Disposable food tray
CH705696A2 (de) * 2011-10-25 2013-04-30 Packartis Ag Verpackungsmaterial.
DE202012102550U1 (de) * 2012-07-11 2012-10-17 Kobusch-Sengewald Gmbh Verpackungslaminat und Verpackungsbehälter
CH708399A1 (de) * 2013-07-22 2015-01-30 Cartonspecialist Behälter zur Verpackung von Lebensmitteln.
DE102013111604A1 (de) * 2013-10-21 2015-04-23 Paccor International Gmbh Muldenförmig ausgebildetes Teil

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200399011A1 (en) * 2014-11-17 2020-12-24 Gpcp Ip Holdings Llc Press-Formed Disposable Container Made from a Laminated Paperboard Structure
US11866242B2 (en) 2016-10-31 2024-01-09 Selig Sealing Products, Inc. Tabbed inner seal
US11708198B2 (en) 2018-07-09 2023-07-25 Selig Sealing Products, Inc. Grip enhancements for tabbed seal
US11724863B2 (en) 2018-07-09 2023-08-15 Selig Sealing Products, Inc. Tabbed seal with oversized tab
WO2022171572A1 (de) * 2021-02-12 2022-08-18 M+C Schiffer Gmbh Verfahren zur herstellung eines behälters aus fasermaterial und behälter aus fasermaterial
WO2022197903A1 (en) * 2021-03-19 2022-09-22 Selig Sealing Products, Inc. Compostable sealing member

Also Published As

Publication number Publication date
CH712789A1 (de) 2018-02-15
ES2839507T3 (es) 2021-07-05
DK3278972T3 (da) 2021-01-11
PL3278972T3 (pl) 2021-05-17
EP3278972A1 (de) 2018-02-07

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